The Doctor hadn't seen the Master since the events leading up to his own regenration. He was sure that the other time lord had long gone. But that was far from it. He had never expected the Master to even be alive.
He had heard reports of an insane time lord been locked up in a insane asylum, He hadn't put the Master there of course. He had considered it in the past but really doubted if that would ever help the Master, He knew there wasn't much that could help the Master.
He started up the TARDIS. He was alone. Rory , Amy, Clara, River, They all weren't there for him anymore. He tried to not dwel on it. He didn't want to go back to sulking and refusing to help anybody. He had already done that, A second time when he had lost Clara.

Though he had realized the universe still needed him, he had only managed to pull out of that recently due to hearing reports about the man that he was guessing was the MAster. He could be wrong, but wasn't sure there was any other surviours from the Time war "Geromino!!" He yelled as the TARDIS was off through time and space. He landed roughly and just laughed. It had been a long time since he was able to laugh from joy and happiness. He did like it better when he wasn't sulking and miserable. He had more fun.
Opening the TARDIS, he looked around. He saw that he was in the Asylum.

He walked out of the TARDIS. The place made him uneasy. He thought it was a rather miserable place to be really. He went to speak with somebody. "I'm here to see the time lord you have here." He looked serious.
The Doctor was serious sometimes, usaully in moments that called for it. He was looking around. He really hoped he didn't have to spend too long here. He really didn't like it. He was munching on a jammy dodger while he was waiting.

"I'm afraid that isn't a good idea sir, Hes very unstable, " The man replied. 

The Doctor was looking at him "I am the Doctor, I can handle him," He ingored any further warnings and walked off to find the Master, He was having to think hard where the Master would even be. He was sure it had to be him. Walking until he found the right room, he let himself in and unlocked the door with his sonic screwdriver. He noticed a dark haired man sitting there. He made sure to lock the door behind him. At least until he could deal with the Master and find out what was going on. He sighed. He could tell right away that it was the MAster behind his new look.
He had no idea what to expect. He knew the Master must still be crazy to have been locked up here.

"Master ? Is that you?" THe Doctor was sure the MAster would still hate him. He wasn't sure what had even happened to him after they last saw each other. The Master had dissapeared and the Doctor had thought that he was gone.
It had been a very long time since he had even seen him. He wondered if the Master still suffered from the effects of the drums. He didn't think he could leave the Master locked up in a place that wouldn't help.
But he had no idea if it was safe to even let him go. He ran a hand through his hair feeling neverous and he straigtened his bow tie,

"I don't know what happened, But I never wanted you here," THe Doctor replied. He wondered if the Master would even want to see him. He very much doubted it. He knew how angry the Master had got in the past.
Alot had changed since then. But the Master couldn't be better. Not if he was here.
He was sure he was the only one who could even help the troubled time lord.